Others may know more, but it looks like a *light* acid wash AFTER the pool is full and the deck has been grouted, would remove those marks.

But, time will probably remove them, too, and with less damage to the coping surface.

Also -- and I'm guessing -- I think most concrete product suppliers would consider such storage marks 'normal'. They will (usually) weather away, and trying to avoid them may well be hard. High end decorative products may be handled in such a way to avoid such marks, but then you have to pay the big $$$'s. I doubt you'll find plain cast concrete handled that way.

I'd really encourage you to wait till the end of a season before resorting to an acid wash. But, I would NOT put a 'sealer' on the coping or deck castings, till the marks are gone